Let’s start with the following model: response = function of (A,B,C,D,AB,AC,AD,BC,BD,CD,ABC,ABD,BCD) If one did a stepwise regression model of all these variables, then one could see the AIC differences between models. It would be interesting to see if there was the model with (A,B,C,D, AB AD, ABC) had a lower AIC than the model with (A, B, C, D,…[Read more]